Take blue shift into consideration.....
Say we speed up a red laser to half of light speed relative to us. (Coming toward us)
Once red light will be blue shifted into higher frequencies, and with fine tuning will be able to produce gamma rays. Once low energy will be raised to higher energy and we can harvest the energy it took to speed up the laser.
Any problems?
>:( Ok I just learned that now (to patch up the special relativity hack) electrons must emit TWO photons. What happens when one of these photons is absorbed?? Two more come out?
It is important to know this to carry on with my theory.